Draft chamber



FIG. 1 is a front perspective view of a draft chamber of the presentinvention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown represent unclaimed subject matter and form nopart of the claimed design.

CLAIM We claim the ornamental design for a draft chamber, as shown anddescribed.